Add testcase to test stacking mode for containers

testcases/t/09-stacking.t

@@ -0,0 +1,138 @@
+#!perl
+# vim:ts=4:sw=4:expandtab
+# Beware that this test uses workspace 9 to perform some tests (it expects
+# the workspace to be empty).
+# TODO: skip it by default?
+
+use Test::More tests => 24;
+use Test::Deep;
+use X11::XCB qw(:all);
+use Data::Dumper;
+use Time::HiRes qw(sleep);
+use FindBin;
+use lib "$FindBin::Bin/lib";
+use i3test;
+
+BEGIN {
+    use_ok('IO::Socket::UNIX') or BAIL_OUT('Cannot load IO::Socket::UNIX');
+    use_ok('X11::XCB::Connection') or BAIL_OUT('Cannot load X11::XCB::Connection');
+}
+
+X11::XCB::Connection->connect(':0');
+
+my $sock = IO::Socket::UNIX->new(Peer => '/tmp/i3-ipc.sock');
+isa_ok($sock, 'IO::Socket::UNIX');
+
+# Switch to the nineth workspace
+$sock->write(i3test::format_ipc_command("9"));
+
+sleep(0.25);
+
+#####################################################################
+# Create two windows and make sure focus switching works
+#####################################################################
+
+my $top = i3test::open_standard_window;
+sleep(0.25);
+my $mid = i3test::open_standard_window;
+sleep(0.25);
+my $bottom = i3test::open_standard_window;
+sleep(0.25);
+
+diag("top id = " . $top->id);
+diag("mid id = " . $mid->id);
+diag("bottom id = " . $bottom->id);
+
+#
+# Returns the input focus after sending the given command to i3 via IPC
+# end sleeping for half a second to make sure i3 reacted
+#
+sub focus_after {
+    my $msg = shift;
+
+    $sock->write(i3test::format_ipc_command($msg));
+    sleep(0.25);
+    return X11::XCB::Connection->input_focus;
+}
+
+$focus = X11::XCB::Connection->input_focus;
+is($focus, $bottom->id, "Latest window focused");
+
+$focus = focus_after("s");
+is($focus, $bottom->id, "Last window still focused");
+
+$focus = focus_after("k");
+is($focus, $mid->id, "Middle window focused");
+
+$focus = focus_after("k");
+is($focus, $top->id, "Top window focused");
+
+#####################################################################
+# Test focus wrapping
+#####################################################################
+
+$focus = focus_after("k");
+is($focus, $bottom->id, "Bottom window focused (wrapping to the top works)");
+
+$focus = focus_after("j");
+is($focus, $top->id, "Top window focused (wrapping to the bottom works)");
+
+#####################################################################
+# Restore of focus after moving windows out/into the stack
+#####################################################################
+
+$focus = focus_after("ml");
+is($focus, $top->id, "Top window still focused (focus after moving)");
+
+$focus = focus_after("h");
+is($focus, $bottom->id, "Bottom window focused (focus after moving)");
+
+my $new = i3test::open_standard_window;
+sleep(0.25);
+
+# By now, we have this layout:
+# ----------------
+# | mid    |
+# | bottom | top
+# | new    |
+# ----------------
+
+$focus = focus_after("l");
+is($focus, $top->id, "Got top window");
+
+$focus = focus_after("mh");
+is($focus, $top->id, "Moved it into the stack");
+
+$focus = focus_after("k");
+is($focus, $new->id, "Window above is new");
+
+$focus = focus_after("k");
+is($focus, $bottom->id, "Window above is bottom");
+
+$focus = focus_after("k");
+is($focus, $mid->id, "Window above is mid");
+
+$focus = focus_after("k");
+is($focus, $top->id, "At top again");
+
+$focus = focus_after("ml");
+is($focus, $top->id, "Still at top, moved out");
+
+$focus = focus_after("h");
+is($focus, $mid->id, "At mid again");
+
+$focus = focus_after("j");
+is($focus, $bottom->id, "At bottom again");
+
+$focus = focus_after("l");
+is($focus, $top->id, "At top again");
+
+$focus = focus_after("mh");
+is($focus, $top->id, "Still at top, moved into");
+
+$focus = focus_after("k");
+is($focus, $bottom->id, "Window above is bottom");
+
+$focus = focus_after("k");
+is($focus, $mid->id, "Window above is mid");
+

testcases/t/lib/i3test.pm

@@ -5,6 +5,13 @@ use X11::XCB::Rect;
 use X11::XCB::Window;
 use X11::XCB qw(:all);
 
+BEGIN {
+    my $window_count = 0;
+    sub counter_window {
+        return $window_count++;
+    }
+}
+
 sub open_standard_window {
     my $original_rect = X11::XCB::Rect->new(x => 0, y => 0, width => 30, height => 30);
 
@@ -15,6 +22,7 @@ sub open_standard_window {
     );
 
     $window->create;
+    $window->name('Window ' . counter_window());
     $window->map;
 
     sleep(0.25);